U.S. patent application number 14/314144 was filed with the patent office on 2015-09-17 for device and method for adjusting a power supply voltage for a display panel, and display device.
The applicant listed for this patent is BEIJING BOE DISPLAY TECHNOLOGY CO., LTD, BOE TECHNOLOGY GROUP CO., LTD. Invention is credited to Yiqiang LAI.
Application Number | 20150262541 14/314144 |
Document ID | / |
Family ID | 51040704 |
Filed Date | 2015-09-17 |
United States Patent
Application |
20150262541 |
Kind Code |
A1 |
LAI; Yiqiang |
September 17, 2015 |
Device and Method for Adjusting A Power Supply Voltage for A
Display Panel, and Display Device
Abstract
The present invention provides a device for adjusting a power
supply voltage for a display panel, comprising a timing controller
and a power management unit connected thereto, wherein the timing
controller is able to send a power supply voltage reduction signal
to the power management unit, and the power management unit is able
to output a reduced power supply voltage according to the power
supply voltage reduction signal.
Inventors: |
LAI; Yiqiang; (Beijing,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BOE TECHNOLOGY GROUP CO., LTD
BEIJING BOE DISPLAY TECHNOLOGY CO., LTD |
Beijing
Beijing |
|
CN
CN |
|
|
Family ID: |
51040704 |
Appl. No.: |
14/314144 |
Filed: |
June 25, 2014 |
Current U.S.
Class: |
345/212 ;
345/99 |
Current CPC
Class: |
G09G 2330/021 20130101;
G09G 5/18 20130101; G09G 3/3696 20130101; G09G 3/3611 20130101;
G09G 2320/0673 20130101 |
International
Class: |
G09G 3/36 20060101
G09G003/36; G09G 5/18 20060101 G09G005/18 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 13, 2014 |
CN |
201410093094.1 |
Claims
1. A device for adjusting a power supply voltage for a display
panel, comprising a timing controller and a power management unit
connected thereto, wherein the timing controller is able to send a
power supply voltage reduction signal to the power management unit,
and the power management unit is able to output a reduced power
supply voltage according to the power supply voltage reduction
signal.
2. The device of claim 1, further comprising a gamma adjustment
unit connected to the timing controller, wherein the timing
controller is able to send a first gamma voltage selection signal
to the gamma adjustment unit, and the gamma adjustment unit is able
to select and output a gamma voltage corresponding to the reduced
power supply voltage according to the first gamma voltage selection
signal.
3. The device of claim 1, wherein the timing controller is also
able to send a power supply voltage recovery signal to the power
management unit, and the power management unit is able to output a
normal power supply voltage according to the power supply voltage
recovery signal.
4. The device of claim 2, wherein the timing controller is also
able to send a power supply voltage recovery signal to the power
management unit, and the power management unit is able to output a
normal power supply voltage according to the power supply voltage
recovery signal.
5. The device of claim 4, wherein the timing controller is also
able to send a second gamma voltage selection signal to the gamma
adjustment unit, the gamma adjustment unit is able to select and
output a gamma voltage corresponding to the normal power supply
voltage according to the second gamma voltage selection signal.
6. The device of claim 5, wherein a first voltage value and a
second voltage value which is smaller than the first voltage value
are pre-stored in the timing controller, the power supply voltage
reduction signal includes the second voltage value therein, the
reduced power supply voltage corresponds to the second voltage
value, the power supply voltage recovery signal includes the first
voltage value therein, and the normal power supply voltage
corresponds to the first voltage value.
7. The device of claim 6, wherein a first gamma voltage set
corresponding to the first voltage value and a second gamma voltage
set corresponding to the second voltage value are pre-stored in the
gamma adjustment unit.
8. The device of claim 1, wherein the timing controller is
connected to the power management unit via an I2C bus.
9. The device of claim 1, wherein the timing controller is provided
with an energy-saving interface for receiving an energy-saving
enable signal and an energy-saving disable signal.
10. A method for adjusting a power supply voltage for a display
panel by using a device for adjusting a power supply voltage for a
display panel, the device for adjusting a power supply voltage for
a display panel comprising a timing controller and a power
management unit connected thereto, wherein the timing controller is
able to send a power supply voltage reduction signal to the power
management unit, and the power management unit is able to output a
reduced power supply voltage according to the power supply voltage
reduction signal, and the method comprising a step of: S1: the
timing controller sending the power supply voltage reduction signal
to the power management unit upon receipt of an energy-saving
enable signal, and the power management unit outputting the reduced
power supply voltage according to the power supply voltage
reduction signal.
11. The method of claim 10, wherein the device for adjusting a
power supply voltage for a display panel further comprises a gamma
adjustment unit connected to the timing controller, and the step S1
further comprises: the timing controller sending a first gamma
voltage selection signal to the gamma adjustment unit upon receipt
of the energy-saving enable signal, and the gamma adjustment unit
outputting a gamma voltage corresponding to the reduced power
supply voltage according to the first gamma voltage selection
signal.
12. The method of claim 10, further comprising a step of: S2: the
timing controller sending a power supply voltage recovery signal to
the power management unit upon receipt of an energy-saving disable
signal, and the power management unit outputting a normal power
supply voltage according to the power supply voltage recovery
signal.
13. The method of claim 11, further comprising a step of: S2: the
timing controller sending a power supply voltage recovery signal to
the power management unit upon receipt of an energy-saving disable
signal, and the power management unit outputting a normal power
supply voltage according to the power supply voltage recovery
signal.
14. The method of claim 13, wherein the step S2 further comprises:
the timing controller sending a second gamma voltage selection
signal to the gamma adjustment unit upon receipt of the
energy-saving enable signal, and the gamma adjustment unit
outputting a gamma voltage corresponding to the normal power supply
voltage according to the second gamma voltage selection signal.
15. The method of claim 14, wherein a first voltage value and a
second voltage value which is smaller than the first voltage value
are pre-stored in the timing controller, and in the step S1, the
timing controller sends a power supply voltage reduction signal
including the second voltage value to the power management unit
upon receipt of the energy-saving enable signal, and the power
management unit outputs a power supply voltage corresponding to the
second voltage value according to the power supply voltage
reduction signal; in the step S2, the timing controller sends a
power supply voltage recovery signal including the first voltage
value to the power management unit upon receipt of the
energy-saving disable signal, and the power management unit outputs
a power supply voltage corresponding to the first voltage value
according to the power supply voltage recovery signal.
16. The method of claim 15, wherein a first gamma voltage set
corresponding to the first voltage value and a second gamma voltage
set corresponding to the second voltage value are pre-stored in the
gamma adjustment unit, and in the step S1, the timing controller
sends a first gamma voltage selection signal to the gamma
adjustment unit upon receipt of the energy-saving enable signal,
and the gamma adjustment unit outputs the second gamma voltage set
according to the first gamma voltage selection signal, and in the
step S2, the timing controller sends a second gamma voltage
selection signal to the gamma adjustment unit upon receipt of the
energy-saving disable signal, and the gamma adjustment unit outputs
the first gamma voltage set according to the second gamma voltage
selection signal.
17. A display device comprising the device of claim 1, wherein the
power management unit is electrically connected to power supply of
the display device.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to the field of display
technology, and particularly to a device and a method for adjusting
a power supply voltage for a display panel, and a display device
including the device for adjusting a power supply voltage for a
display panel.
BACKGROUND OF THE INVENTION
[0002] In a liquid crystal display device, power consumption caused
by load of a display panel is one of the major parts of the total
power consumption of the display panel. The power consumption
caused by the load of the display panel is associated with a power
supply voltage for driving the display panel, and when the load of
the display panel is fixed, the higher the power supply voltage for
driving the display panel is, the larger power consumption the load
of the display panel will cause Generally, in the liquid crystal
display device, for better contrast and quicker response, value of
the power supply voltage for driving the display panel may be
increased as much as possible.
[0003] However, when the display panel is not required to have a
high contrast and a quick response (for example, when a static
image or paperwork is displayed), a lower power supply voltage may
be used for the display panel so as to lower the power consumption.
In addition, when a mobile device in use goes into an energy-saving
mode, a lower power supply voltage may also be used for the display
panel so as to lower the power consumption.
[0004] Therefore, it is required to provide a device and a method
for adjusting a supply power for a display panel, so as to lower
the supply power for driving the display panel when necessary.
SUMMARY OF THE INVENTION
[0005] In view of the above, an object of the present invention is
to provide a device and a method for adjusting a power supply
voltage for a display panel, and a display device comprising the
device for adjusting a power supply voltage for a display panel,
which can lower the supply power for the display panel.
[0006] To achieve the above object, the present invention provides
a device for adjusting a power supply voltage for a display panel,
comprising a timing controller and a power management unit
connected thereto, wherein the timing controller is able to send a
power supply voltage reduction signal to the power management unit,
and the power management unit is able to output a reduced power
supply voltage according to the power supply voltage reduction
signal.
[0007] Preferably, the device for adjusting a power supply voltage
for a display panel further comprises a gamma adjustment unit
connected to the timing controller, wherein the timing controller
is able to send a first gamma voltage selection signal to the gamma
adjustment unit, and the gamma adjustment unit is able to select
and output a gamma voltage corresponding to the reduced power
supply voltage according to the first gamma voltage selection
signal.
[0008] Preferably, the timing controller is also able to send a
power supply voltage recovery signal to the power management unit,
and the power management unit is able to output a normal power
supply voltage according to the power supply voltage recovery
signal.
[0009] Preferably, the timing controller is also able to send a
second gamma voltage selection signal to the gamma adjustment unit,
the gamma adjustment unit is able to select and output a gamma
voltage corresponding to the normal power supply voltage according
to the second gamma voltage selection signal.
[0010] Preferably, a first voltage value and a second voltage value
which is smaller than the first voltage value are pre-stored in the
timing controller, the power supply voltage reduction signal
includes the second voltage value therein, the reduced power supply
voltage corresponds to the second voltage value, the power supply
voltage recovery signal includes the first voltage value therein,
and the normal power supply voltage corresponds to the first
voltage value.
[0011] Preferably, a first gamma voltage set corresponding to the
first voltage value and a second gamma voltage set corresponding to
the second voltage value are pre-stored in the gamma adjustment
unit.
[0012] Preferably, the timing controller is connected to the power
management unit via an I2C bus.
[0013] Preferably, the timing controller is provided with an
energy-saving interface for receiving an energy-saving enable
signal and an energy-saving disable signal.
[0014] Accordingly, the present invention also provides a method
for adjusting a power supply voltage for a display panel by using a
device for adjusting a power supply voltage for a display panel,
comprising a timing controller and a power management unit
connected thereto, wherein the timing controller is able to send a
power supply voltage reduction signal to the power management unit,
and the power management unit is able to output a reduced power
supply voltage according to the power supply voltage reduction
signal, and the method comprising a step of:
[0015] S1: the timing controller sending the power supply voltage
reduction signal to the power management unit upon receipt of an
energy-saving enable signal, and the power management unit
outputting the reduced power supply voltage according to the power
supply voltage reduction signal.
[0016] Preferably, the device for adjusting a power supply voltage
for a display panel further comprises a gamma adjustment unit
connected to the timing controller, and the step S1 further
comprises: the timing controller sending a first gamma voltage
selection signal to the gamma adjustment unit upon receipt of the
energy-saving enable signal, and the gamma adjustment unit
outputting a gamma voltage corresponding to the reduced power
supply voltage according to the first gamma voltage selection
signal.
[0017] Preferably, the method further comprises a step of:
[0018] S2: the timing controller sending a power supply voltage
recovery signal to the power management unit upon receipt of an
energy-saving disable signal, and the power management unit
outputting a normal power supply voltage according to the power
supply voltage recovery signal.
[0019] Preferably, the step S2 further comprises: the timing
controller sending a second gamma voltage selection signal to the
gamma adjustment unit upon receipt of the energy-saving enable
signal, and the gamma adjustment unit outputting a gamma voltage
corresponding to the normal power supply voltage according to the
second gamma voltage selection signal.
[0020] Preferably, a first voltage value and a second voltage value
which is smaller than the first voltage value are pre-stored in the
timing controller, and in the step S1, the timing controller
sending a power supply voltage reduction signal including the
second voltage value to the power management unit upon receipt of
the energy-saving enable signal, and the power management unit
outputting a power supply voltage corresponding to the second
voltage value according to the power supply voltage reduction
signal; in the step S2, the timing controller sending a power
supply voltage recovery signal including the first voltage value to
the power management unit upon receipt of the energy-saving disable
signal, and the power management unit outputting a power supply
voltage corresponding to the first voltage value according to the
power supply voltage recovery signal.
[0021] Preferably, a first gamma voltage set corresponding to the
first voltage value and a second gamma voltage set corresponding to
the second voltage value are pre-stored in the gamma adjustment
unit, and in the step S1, the timing controller sends a first gamma
voltage selection signal to the gamma adjustment unit upon receipt
of the energy-saving enable signal, and the gamma adjustment unit
outputs the second gamma voltage set according to the first gamma
voltage selection signal, and in the step S2, the timing controller
sends a second gamma voltage selection signal to the gamma
adjustment unit upon receipt of the energy-saving disable signal,
and the gamma adjustment unit outputs the first gamma voltage set
according to the second gamma voltage selection signal.
[0022] Accordingly, the present invention also provides a display
device comprising the above-described device for adjusting a power
supply voltage for a display panel, wherein the power management
unit is electrically connected to power supply of the display
device.
[0023] It can be seen that, in the present invention, the timing
controller sends a power supply voltage reduction signal to the
power management unit, so that the power management unit can output
a reduced power supply voltage accordingly, thus lowering power
consumption. Meanwhile, the timing controller can also send a gamma
voltage selection signal to the gamma adjustment unit, so that the
gamma adjustment unit outputs a gamma voltage corresponding to the
power supply voltage.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The following drawings provided for further understanding of
the present invention constitute a part of the specification, and,
together with the following specific implementations, are used for
explaining the present invention, rather than limiting the present
invention, in which:
[0025] FIG. 1 is a schematic diagram of a device for adjusting a
power supply voltage for a display panel provided by the present
invention; and
[0026] FIG. 2 is a flow chart of a method for adjusting a power
supply voltage for a display panel provided by the present
invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] The specific implementations of the present invention are
described below in detail in conjunction with the accompanying
drawings. It should be understood that the specific implementations
described herein are merely used for describing and explaining the
present invention, but not for limiting the present invention.
[0028] As an aspect of the present invention, a device for
adjusting a power supply voltage for a display panel is provided.
As shown in FIG. 1, the device for adjusting a power supply voltage
for a display panel includes a timing controller 10 and a power
management unit 20 connected to the timing controller 10, the
timing controller 10 can send a power supply voltage reduction
signal to the power management unit 20, and the power management
unit 20 can output a reduced power supply voltage according to the
received power supply voltage reduction signal.
[0029] When a display panel is not required to have high contrast
and quick response, or when a mobile display device goes into an
energy-saving mode, the above device for adjusting a power supply
voltage for a display panel may lower the power supply voltage
applied to the display panel so as to lower power consumption.
Specifically, when it is required to lower the power supply voltage
supplied to the display panel, the timing controller 10 may send
the power supply voltage reduction signal to the power management
unit 20, and the power management unit 20 may output the reduced
power supply voltage according to the received power supply voltage
reduction signal.
[0030] Generally, power consumption caused by load of a display
panel may be calculated according to the formula P=(1/2)CfV.sup.2,
wherein, C is the equivalent capacitive load of the display panel,
f is the frequency of alternating current charging the capacitive
load, and V is the power supply voltage. It is thus clear that when
C and f are fixed, reducing the power supply voltage may greatly
lower power consumption.
[0031] Further, when the display panel is required to have high
contrast and quick response, or when the mobile display device
exits the energy-saving mode, the above device for adjusting a
power supply voltage for a display panel may resume supplying a
normal power supply voltage to the display panel, Specifically,
when it is required to return to the normal power supply voltage to
be applied to the display panel, the timing controller 10 may send
the power supply voltage recovery signal to the power management
unit 20, and the power management unit 20 may output the normal
power supply voltage according to the power supply voltage recovery
signal.
[0032] Further, a first voltage value and a second voltage value
may be pre-stored in the timing controller 10, and the second
voltage value may be smaller than the first voltage value. The
power supply voltage reduction signal sent to the power management
unit 20 from the timing controller 10 may include the second
voltage value, and the power management unit 20 may output a power
supply voltage corresponding to the second voltage value according
to the power supply voltage reduction signal; in addition, the
power supply voltage recovery signal sent to the power management
unit 20 from the timing controller 10 may include the first voltage
value, and the power management unit 20 may output a power supply
voltage corresponding to the first voltage value according to the
power supply voltage recovery signal. Specifically, the first
voltage value and the second voltage value may be pre-stored in the
timing controller 10, and the second voltage value may be smaller
than the first voltage value, that is, the first voltage value
corresponds to the value of the power supply voltage when the
display panel operates normally, and the second voltage value
corresponds to the value of the power supply voltage when power
consumption needs to be lowered. When power consumption needs to be
lowered, the timing controller 10 may send a power supply voltage
reduction signal including the second voltage value to the power
management unit 20, and afterwards, the power management unit 20
may output the power supply voltage corresponding to the second
voltage value according to the power supply voltage reduction
signal. When the energy-saving mode in which power consumption is
reduced needs to be terminated, the timing controller 10 may send a
power supply voltage recovery signal including the first voltage
value to the power management unit 20, and afterwards, the power
management unit 20 may output the power supply voltage
corresponding to the first voltage value according to the power
supply voltage recovery signal.
[0033] Further, the device for adjusting a power supply voltage for
a display panel further comprises a gamma adjustment unit 30
connected to the timing controller 10, the timing controller 10 can
send a gamma voltage selection signal to the gamma adjustment unit
30, and the gamma adjustment unit 30 can select and output a gamma
voltage corresponding to the power supply voltage according to the
gamma voltage selection signal. In general, in a display device,
deviation in brightness of a displayed picture exists due to a
video card or a display panel, and in this case, gamma value of the
display device should be maintained at a value of 2.2 through
outputting a corresponding gamma voltage by the gamma adjustment
unit, so as to correct the brightness of the picture. This part
belongs to prior art, and therefore is not elaborated herein.
[0034] To maintain the gamma value at 2.2, it is required to adjust
the value of the gamma voltage output by the gamma adjustment unit
30, while the power management unit 20 outputs the reduced supply
power. Specifically, the timing controller 10 may send a first
gamma voltage selection signal to the gamma adjustment unit 30, and
the gamma adjustment unit 30 may select and output a gamma voltage
corresponding to the reduced supply power according to the first
gamma voltage selection signal. While the power management unit 20
outputs the normal power supply voltage, the timing controller 10
may send a second gamma voltage selection signal to the gamma
adjustment unit 30, and the gamma adjustment unit 30 can select and
output a gamma voltage corresponding to the normal power supply
voltage according to the second gamma voltage selection signal.
[0035] Further, a first gamma voltage set and a second gamma
voltage set are pre-stored in the gamma adjustment unit 30,
wherein, the first gamma voltage set corresponds to the above first
voltage value, and the second gamma voltage set corresponds to the
above second voltage value. Specifically, when power consumption
needs to be lowered, the timing controller 10 may send the first
gamma voltage selection signal to the gamma adjustment unit 30, and
the gamma adjustment unit 30 outputs the second gamma voltage set
corresponding to the second voltage value; when the energy-saving
mode in which power consumption is lowered needs to be terminated,
the timing controller 10 may send the second gamma voltage
selection signal to the gamma adjustment unit 30, and the gamma
adjustment unit 30 outputs the first gamma voltage set
corresponding to the first voltage value.
[0036] Further, the timing controller 10 may be connected to the
power management unit 20 via I2C (Inter-Integrated Circuit) bus.
Specifically, the power supply voltage reduction signal or the
power supply voltage recovery signal may be sent to the power
management unit 20 from the timing controller 10 via the I2C bus,
to enable the power management unit 20 to adjust power supply
voltage immediately.
[0037] Further, the timing controller 10 may be provided with an
energy-saving signal interface, which can be used for receiving an
energy-saving enable signal and an energy-saving disable signal.
Specifically, the timing controller 10 may be provided with the
energy-saving signal interface for receiving the energy-saving
enable signal and the energy-saving disable signal, and the
interface may be, for example, a pin of the timing controller
10.
[0038] As another aspect of the present invention, the present
invention provides a method for adjusting a power supply voltage
for a display panel, and the method uses the above device provided
by the present invention to achieve adjustment of the power supply
voltage of the display panel. As shown in FIG. 2, the method may
comprise a step of:
[0039] S1: the timing controller sending the power supply voltage
reduction signal to the power management unit upon receipt of an
energy-saving enable signal, and the power management unit
outputting the reduced power supply voltage according to the power
supply voltage reduction signal.
[0040] Specifically, the timing controller may send the power
supply voltage reduction signal to the power management unit upon
receipt of the energy-saving enable signal, so that the power
management unit may output the reduced supply voltage.
[0041] Further, the above device for adjusting a power supply
voltage for a display panel further comprises a gamma adjustment
unit, which may be connected to the timing controller, and the step
S1 may further comprise: the timing controller sending a first
gamma voltage selection signal to the gamma adjustment unit upon
receipt of the energy-saving enable signal, and the gamma
adjustment unit outputting a gamma voltage corresponding to the
reduced power supply voltage according to the first gamma voltage
selection signal.
[0042] Further, the method may further comprise a step of:
[0043] S2: the timing controller sending a power supply voltage
recovery signal to the power management unit upon receipt of an
energy-saving disable signal, and the power management unit
outputting the normal power supply voltage according to the power
supply voltage recovery signal.
[0044] Further, the step S2 may further comprise: the timing
controller sending a second gamma voltage selection signal to the
gamma adjustment unit upon receipt of the energy-saving enable
signal, and the gamma adjustment unit outputting a gamma voltage
corresponding to the normal power supply voltage according to the
second gamma voltage selection signal.
[0045] Specifically, upon receipt of an energy-saving disable
signal, that is, when a normal operation mode needs to be resumed,
the timing controller may send the power supply voltage recovery
signal to the power management unit, and the power management unit
outputs a power supply voltage corresponding to the normal
operating voltage.
[0046] Further, a first voltage value and a second voltage value
which is smaller than the first voltage value are pre-stored in the
timing controller, and in the above step S1, the timing controller
sends the power supply voltage reduction signal including the
second voltage value to the power management unit upon receipt of
the energy-saving enable signal, and the power management unit
outputs a power supply voltage corresponding to the second voltage
value according to the power supply voltage reduction signal; in
the above step S2, the timing controller sends the power supply
voltage recovery signal including the first voltage value to the
power management unit upon receipt of the energy-saving disable
signal, and the power management unit outputs a power supply
voltage corresponding to the first voltage value according to the
power supply voltage recovery signal.
[0047] Preferably, a first gamma voltage set corresponding to the
first voltage value and a second gamma voltage set corresponding to
the second voltage value are pre-stored in the gamma adjustment
unit, and in the above step S1, the timing controller may also send
a first gamma voltage selection signal to the gamma adjustment unit
upon receipt of the energy-saving enable signal, and the gamma
adjustment unit may output the second gamma voltage set
corresponding to the second voltage value according to the first
gamma voltage selection signal; and in the above step S2, the
timing controller may also send a second gamma voltage selection
signal to the gamma adjustment unit upon receipt of the
energy-saving disable signal, and the gamma adjustment unit may
output the first gamma voltage set corresponding to the first
voltage value according to the second gamma voltage selection
signal.
[0048] It should be noted that in the above device and method for
adjusting a power supply voltage for a display panel provided by
the present invention, whether an energy-saving operating mode with
lowered power consumption needs to be enabled is determined
artificially or determined automatically through a preset program.
For example, a determining program may be preset, and when it is
determined that an object displayed on the display device does not
require high contrast and quick response (for example, when a PDF
document is displayed), an energy-saving enable signal is sent to
the timing controller and the energy-saving operating mode with
lowered power consumption is enabled automatically; when it is
determined that an object displayed on the display panel requires
high contrast and quick response (for example, when a video is
displayed), an energy-saving disable signal is sent to the timing
controller and the energy-saving operating mode with lowered power
consumption is disabled automatically.
[0049] The device and method for adjusting a power supply voltage
for a display panel provided by the present invention are described
above, and it can be seen that, in the present invention, the
timing controller sends a power supply voltage reduction signal to
the power management unit, so that the power management unit can
output a reduced power supply voltage accordingly, thus lowering
power consumption. Meanwhile, the timing controller can also send a
gamma voltage selection signal to the gamma adjustment unit, so
that the gamma adjustment unit can output a gamma voltage
corresponding to the supply voltage.
[0050] As still another aspect of the present invention, the
present invention provides a display device, which may comprises
the above-described device for adjusting a power supply voltage for
a display panel provided by the present invention, wherein the
power management unit is electrically connected to power supply of
the display device. Specifically, the power management unit may be
electrically connected to the power supply of the display device
through a connector of the display device, such that the power
supply may provide voltage to the power management unit through the
connector. Of course, the display device also comprises other known
structures such as a display panel, and the like, and these
structures are not described in detail herein.
[0051] It should be noted that the timing controller in the device
for adjusting a power supply voltage for a display panel provided
by the present invention may be a timing controller provided
separately, or may be an existing timing controller for controlling
and driving the display panel in the display device. If the timing
controller is an existing timing controller for controlling and
driving the display panel in the display device, one end of the
timing controller may be connected to the connector of the display
device so as to acquire image signals, and the other end may be
connected to the power management unit, the gamma adjustment unit
and a data driving unit (so as to provide an image signal to the
data driving unit). Accordingly, the power management unit and the
gamma adjustment unit may be connected to the data driving unit, so
as to provide a power supply voltage to the data driving unit.
[0052] It can be understood that the above implementations are
merely exemplary implementations used for explaining the principle
of the present invention, but the present invention is not limited
thereto. For those skilled in the art, various modifications and
improvements may be made without departing from the spirit and
essence of the present invention, and these modifications and
improvements may also be considered to be the protection scope of
the present invention.
* * * * *